Relationship between CME Speed and Geomagnetic Storm Intensity

Details Relationship between CME Speed and Geomagnetic Storm Intensity Relationship between CME Speed and Geomagnetic Storm Intensity

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29i...1s&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 9, pp. 1-1, CiteID 1287, DOI 10.1029/2001GL013597

Astronomy and Astrophysics

Astrophysics

22

Solar Physics, Astrophysics, And Astronomy: Coronal Mass Ejections, And Astronomy: Flares, Interplanetary Physics: Interplanetary Shocks, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions

Scientific paper

In this paper, we discuss the solar origin and interplanetary consequences of the coronal mass ejection of March 29, 2001 that was responsible for the most intense geomagnetic storm (DST ~ -377 nT) of the current solar cycle to date. A comparison of the CME of March 29, 2001, with a set of geo-effective halo CMEs associated with X-class flares showed that the strength of the geomagnetic storm at the earth is well correlated with the speed of the halo. Our study shows that the fast ejection is responsible for building up the ram pressure at the earth's magnetosphere. This may serve as a useful tool in the forecasting of intense geomagnetic storms.

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